DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 33: Real-time stability measurement using active MHD spectroscopy | ||
| Name: | Holger Reimerdes ( |
Affiliation: | Columbia University |
| Research Area: | RWM Physics | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | Use spatial and temporal Fourier analysis of (integrated) magnetic measurements to extract the plasma response to externally applied rotating n=1 fields. | ||
| Experimental Approach/Plan: | This proposal will require some PCS development. While the sensors signals are already available in the PCS, several channels will be required for the results of the real-time calculations. | ||
| Background: | Early detection of imminent stability limits can prompt action to avoid the limit and return the discharge to a stable operating point. Low-frequency active RWM spectroscopy can be used to detect the ideal MHD no-wall stability limit as well as the damping rate of the stable RWM in the wall-stabilized regime. | ||
| Resource Requirements: | Piggy-back on high beta experiments. | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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